Your Guide to Concreting

Concrete is one of the most versatile and easy-to-use building materials available. By following a few simple guidelines, builders and DIY enthusiasts can make their own concrete and make a success of their building projects.

The right materials for concrete

The following materials required to make high quality concrete are available from leading builders’ merchants stocking AfriSam Cement:

  • High quality AfriSam Cement products, which carry the SABS mark and comply with SANS 50197-1.
  • Clean coarse sand, free of leaves, grass, twigs or other foreign matter. Sand should be fairly coarse, with particle sizes ranging from fine dust up to about 5 mm.
  • Clean stone with sizes of 26,5 mm, 19 mm, 13,2 mm or 9,5 mm. Stone sizes of 26,5 mm can be used for thick sections such as foundations, deep suspended slabs and industrial floors thicker than 120 mm. 19 mm Stone can be used for floors, paths, patios and driveways. Stone sizes of 13,2 mm or 9,5 mm can be used for thin concrete sections such as thin suspended slabs, precast items such as lintels, flagstones and other items with section thicknesses ranging from 40 mm to 50 mm.
  • Clean drinkable water.

Determining the right quantity of concrete

Concrete is either poured into formwork or ground excavations. The calculation for the volume of concrete required for square or rectangular sections is carried out as follows:

 

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